Question

Exhibit 2-20

Use the following observations to assist you in answering any questions. You are exploring the relationship (if any) exists between the amount of sugar in one serving of cereal (grams) and the amount of fiber in one serving of cereal (grams).

	Sugar	Fiber
	1.2	3.2
	1.3	3.1
	1.5	2.8
	1.8	2.4
	2.2	1.1
	2.8	1.3
	3.0	1.0

Refer to Exhibit 2-15. If a pie chart was used to express the exam scores, which piece of the pie would be largest?

• A. the scores in the 70’s

• B. the scores in the 60’s

• C. the scores in the 90’s

• D. the scores in the 80’s

2)Refer to Exhibit 2-20. If you plot fiber on the horizontal axis and sugar on the vertical axis of a scatter diagram, the relationship between the variables is

• A. one of no relationship

• B. a negative relationship

• C. a positive relationship

• D. an unfriendly relationship

• Below you are given the examination scores of 20 students.
  

  	52	99	92	86	84
  	63	72	76	95	88
  	92	58	65	79	80
  	90	75	74	56	99

  Let the first class be 50 – 59 in a distribution with similar classes for the 60’s, 70’s, 80’s and 90’s.

  Below you are given the examination scores of 20 students.
  

  	52	99	92	86	84
  	63	72	76	95	88
  	92	58	65	79	80
  	90	75	74	56	99

  Let the first class be 50 – 59 in a distribution with similar classes for the 60’s, 70’s, 80’s and 90’s.

Answer 1

2)Refer to Exhibit 2-20. If you plot fiber on the horizontal axis and sugar on the vertical axis of a scatter diagram, the relationship between the variables is

B. a negative relationship

This is a negative relationship because as one increase (sugar) the other decreases (Fiber)

Refer to Exhibit 2-15. If a pie chart was used to express the exam scores, which piece of the pie would be largest?
C. the scores in the 90’s

Arrange all the score in ascending order and count the score that lie in the first interval. Do this for all the interval. We see that 90 - 99 have the highest frequency.